SIGLENT TECHNOLOGIES SDM3045X Bedienungsanleitung

SDM3045X Service Manual I

SDM3045X

Digital Multimeter

Service Manual

SM06034-E02C

Guaranty and Declaration

Trademark Information

SIGLENT is the registered trademark of SIGLENT TECHNOLOGIES CO.,

LTD

Declaration

⚫SIGLENT products are protected by patent law in and outside of the P.R.C.

⚫SIGLENT reserves the right to modify or change parts of or all the

specifications or pricing policies at company’s sole decision.

⚫Information in this publication replaces all previously corresponding

material.

⚫Any way of copying, extracting or translating the contents of this manual is

not allowed without the permission of SIGLENT.

⚫SIGLENT will not be responsible for losses caused by either incidental or

consequential in connection with the furnishing, use or performance of this

manual as well as any information contained.

Product Certification

SIGLENT guarantees this product conforms to the national and industrial

standards in China as well as the ISO9001: 2015 standard and the ISO14001:

2015 standard. Other international standard conformance certification is in

progress.

SDM3045X Service Manual III

General Safety Summary

Review the following safety precautions to avoid personal injury and to prevent

damage to this product or any products connected to it. To avoid potential

hazards, use this product only as specified.

Only qualified personnel should perform service procedures.

To Avoid Fire or Personal Injuries

Use Proper Power Cord. Use only the power cord specified for this product

and approved by the local regulating body.

Avoid Electric Shock. To avoid injuries or losses of life, do not connect or

disconnect probes or test leads while they are connected to a voltage source.

Ground the Product. This product is grounded through the protective terra

conductor of the power line. To avoid electric shock, the grounding conductor

must be connected to the earth. Make sure the instrument is grounded

correctly before connecting its input or output terminals.

Connect the Probe Properly. Do not connect the probe ground lead to a high

voltage since it has the isobaric electric potential as ground.

Observe All Terminal Ratings. To avoid fire or shock hazard, observe all

ratings and markers on the instrument and check your manual for more

information about ratings before connecting.

Use Proper Fuse. Use only the specified fuse.

Do Not Operate Without Covers. Do not operate this instrument with covers

or panels removed.

Avoid Circuit or Wire Exposed. Do not touch exposed junctions and

components when the unit is powered.

Do Not Operate With Suspected Failures. If you suspect damage has

occurred to this instrument, have it inspected by qualified service personnel

before any further operation. Any maintenance, adjustment or replacement

especially to the circuits or accessories should be performed by SIGLENT

authorized personnel only.

Keep Product Surfaces Clean and Dry.

Do Not Operate in Wet/Damp Conditions. To avoid electric shock, do not

operate the instrument in wet or damp conditions.

Do Not Operate in an Explosive Atmosphere. To avoid injuries or fire

hazards, do not operate in an explosive atmosphere.

Safety Terms and Symbols

Terms on the Product. These terms may appear on the product:

DANGER: Indicates an injury or hazard that may immediately happen.

WARNING: Indicates that there is potential for an injury or hazard.

CAUTION: Indicates damage to the instrument or other property may occur.

Symbols on the Product. These symbols may appear on the product:

SDM3045X Service Manual V 
Catalog 
 
General Safety Summary.............................................................................................................III 
General Features and Specifications..........................................................................................1 
General Features....................................................................................................................1 
Specifications..........................................................................................................................2 
Prepare Information.......................................................................................................................6 
Functional check.....................................................................................................................6 
Power-on Inspection......................................................................................................6 
Default Setup ..................................................................................................................6 
Self Test ...........................................................................................................................7 
Performance Verification...............................................................................................................8 
Performance verification test items .....................................................................................8 
Recommended Test Equipment...........................................................................................8 
Performance verification step...............................................................................................8 
Test Considerations................................................................................................................9 
Zero Offset Verification..........................................................................................................9 
DC Voltage and DC Current Gain Verification.................................................................10 
Frequency Accuracy Verification........................................................................................11 
AC Voltage and AC Current Verification............................................................................11 
Capacitance Verification......................................................................................................12 
Assembly Procedures..................................................................................................................13 
Security Consideration ........................................................................................................13 
Required Tools......................................................................................................................13 
Disassembly Procedures ....................................................................................................14 
Troubleshooting............................................................................................................................18 
ESD Precautions..................................................................................................................18 
Required Equipments..........................................................................................................18 
Analog Board Drawing.........................................................................................................19 
Main Board Drawing ............................................................................................................20 
Check the Power Supply.....................................................................................................21 
Check the Analog Board......................................................................................................22 
Voltage Check...............................................................................................................22 
Analog board Clock Check .........................................................................................23 
Check the Main Board.........................................................................................................23 
Voltage Check...............................................................................................................23 
Microprocessor Check.................................................................................................24 
Quick Guide for General Failures......................................................................................24 
Maintenance..................................................................................................................................25 
Maintenance Summary........................................................................................................25 
Repackaging for Shipment..................................................................................................25 
 
 

SDM3045X Service Manual 1

General Features and Specifications

The SDM3045X is a multimeter with 4½ digit reading resolution and

dual-display suited for any application requiring high-precision, multifunction,

and automated measurements. It features a combination of basic

measurement, multiple math, and display functions, etc.

General Features

⚫Real 4½ digit reading resolution

⚫Up to 150 rdgs/S measurement speed

⚫True-RMS AC Voltage and AC Current measurements

⚫1 Gb Nand Flash size, mass storage configuration files and data files

⚫Built-in cold terminal compensation for accurate thermocouple readings

⚫Includes EasyDMM PC software for easy control and data collection

⚫Built-in help system, convenient to acquire information

⚫Standard communication interfaces: USB Device, USB Host, LAN

(Optional : USB-GPIB Adapter)

⚫USB & LAN remote interfaces support common SCPI commands.

Compatible with other popular DMMs on the market

Specifications

DC Characteristics

Accuracy±（% of Reading + count）[1]

Function

Range[2]

Test current or

Load voltage

Resolution

Accuracy

（one year；

23℃±5℃）

DC Voltage

600 mV

0.01 mV

0.02+ 6

0.0001 V

0.02+ 6

60 V

0.001 V

0.02+ 6

600 V

0.01 V

0.02+ 6

1000 V[4]

0.1 V

0.02+ 6

DC Current

600 μA

< 33 mV

0.01 μA

0.05+ 3

6 mA

< 330 mV

0.0001 mA

0.05+ 3

60 mA

< 0.05 V

0.001 mA

0.05+ 3

600 mA

< 0.5 V

0.01 mA

0.12+ 6

6 A

< 0.33 V

0.0001 A

0.20+ 5

10 A[5]

< 0.6 V

0.001 A

0.25+ 4

Resistance[3]

600 Ω

1 mA

0.01 Ω

0.08+ 6

6 kΩ

1 00 μA

0.0001 kΩ

0.04+ 6

60 kΩ

10 μA

0.001 kΩ

0.04+ 6

600 kΩ

1 μA

0.01 kΩ

0.08+ 6

6 MΩ

200 nA

0.0001 MΩ

0.12+ 3

60 MΩ

200 nA || 10 MΩ

0.001 MΩ

0.85+ 3

100 MΩ

200 nA || 10 MΩ

0.01 MΩ

1.75+ 3

Diode Test[6]

0～2V

1 mA

0.0001 V

0.05+ 3

2～4V

1 mA

0.0001 V

0.35+ 3

Continuity Test

2000 Ω

1 mA

0.1 Ω

0.05+ 3

Remarks:

[1] Specifications are for 0.5 Hour warm-up, “Slow”measurement rate and calibration

temperature 18℃～28℃.

[2]10% over range on all ranges except for DCV 1000 V, ACV 750 V, DCI 10 A and ACI 10

[3] Specifications are for 4-wire measure or 2-wire measure under “REF”operation.±0.2Ω

of extra errors will be generated if perform 2-wire measure without “REF”operation.

[4] Plus 0.02 mV of error per 1 V after the first ±500 VDC.

[5] 30 seconds OFF after 30 seconds ON is recommend foe the continuous current that

higher than DC 7 A or AC RMS 7 A.

[6] Accuracy specifications are only for voltage measuring at input terminal. The typical

value of current under measure is 1 mA. Voltage drop at diode junction may vary with

current supply. Adjustable voltage range ：0~4 V.

SDM3045X Service Manual 3

AC Characteristics

Accuracy ±（% of Reading + count）[1]

Function

Range[2]

Frequency

Range

Resolution

Accuracy

（one year；

23℃±5℃）

True-RMS

AC Voltage [3]

600 mV

20 Hz –45 Hz

0.01 mV

2.0 + 20

45Hz –100 Hz

0.01 mV

0.6 +10

100 Hz –20 kHz

0.01 mV

0.3 + 20

20 kHz –50 kHz

0.01 mV

2.0 + 40

50kHz –100 kHz

0.01 mV

3.0 + 10

20 Hz –45 Hz

0.0001 V

2.0 + 20

45Hz –100Hz

0.0001 V

0.6 + 10

100 Hz –20 kHz

0.0001 V

0.8 + 20

20 kHz –50 kHz

0.0001 V

2.0 + 40

50 kHz –100 kHz

0.0001 V

3.0 + 40

60 V

20 Hz –45 Hz

0.001 V

2.0 + 20

45 Hz –100 Hz

0.001 V

0.6 +10

100 Hz –20 kHz

0.001 V

0.8 + 20

20 kHz –50 kHz

0.001 V

2.0 + 40

50 kHz –100 kHz

0.001 V

3.0 + 40

600 V

20 Hz –45 Hz

0.01 V

2.0 + 20

45 Hz –100 Hz

0.01 V

0.6 + 10

100 Hz –20 kHz

0.01 V

0.8 + 20

20 kHz –50 kHz

0.01 V

2.0 + 40

50 kHz –100 kHz

0.01 V

3.0 + 40

750 V

20 Hz –45 Hz

0.01 V

2.0 + 20

45 Hz –100 Hz[4]

0.01 V

0.6 + 10

100 Hz –20 kHz

0.01 V

0.8 + 20

20 kHz –50 kHz

0.01 V

2.0 + 40

50 kHz –100 kHz

0.01 V

3.0 + 40

True-RMS

AC Current [5]

60 mA

20 Hz –45 Hz

0.001 mA

2.0 + 20

45 Hz –2 kHz

0.001 mA

0.5 + 20

2 kHz –10 kHz

0.001 mA

2.5 + 30

600 mA

20 Hz –45 Hz

0.01 mA

2.0 + 20

45 Hz –2 kHz

0.01 mA

0.5 + 20

2 kHz –10 kHz

0.01 mA

2.5 + 30

6 A

20 Hz –45 Hz

0.0001A

2.0 + 20

45 Hz –2 kHz

0.0001A

0.5 + 20

2 kHz –10 kHz

0.0001A

2.5 + 20

10 A[6]

20 Hz –45 Hz

0.001 A

1.5 + 45

45 Hz –2 kHz

0.001 A

0.5 + 35

2 kHz –10 kHz

0.001 A

2.5 + 25

Additional wave crest factor error ( not Sine ) [7]

Wave crest coefficient

Error（% Range）

1-2

0.05

2-3

0.3

Remarks:

[1] Specifications are for 0.5 Hour warm-up, “Slow”measurement rate and calibration

temperature 18℃~28℃.

[2] 10% over range on all ranges except for DCV 1000 V, ACV 750 V, DCI 10 A and ACI

10 A.

[3] Specifications are for amplitude of sine wave input > 5% of range. For inputs from 1%

to 5% of range and < 50 kHz, add 0.1% of range extra error. For 50 kHz to 100 kHz,

add 0.1% of range extra error.

[4] Plus 0.025 V of error per 1 V after the first ±400 VAC.

[5] Specifications are for sine wave input > 5% of range. 0.1% errors will be added when

the range of input sine wave is 1% to 5%.

[6] 30 seconds OFF after 30 seconds ON is recommend foe the continuous current that

higher than DC 7 A or AC RMS 7 A.

[7] For inputs Frequency Range < 100Hz

Frequency and Period Characteristics

Accuracy ±（% of Reading + count）[1]

Function

Range

Frequency

Range

Resolution

Accuracy

（one year；

23℃±5 ℃）

Frequency

/Period

600 mV 至750 V[2]

20 Hz –2 kHz

0.01+3

2 kHz –20 kHz

0.01+2

20 kHz –200 kHz

0.01+2

200 kHz–500 kHz

0.01+2

Remarks:

[1] Specifications are for 0.5 Hour warm-up.

[2] Except for special marks, the AC input voltage is 5% to 110% of range when <100 kHz

and 10% to 110% of range when >100 kHz. 750 V range is limited to 750 Vrms.

The accuracy is 10 times % of Reading when the measurement range of AC voltage is

in 600mV range.

Inhaltsverzeichnis

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